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[PATCH] Really ignore kmem_cache_destroy return value
[linux-2.6/lfs.git] / fs / reiserfs / super.c
blob1cd4d387f690649a1653c4dfaed4db9af626268b
1 /*
2 * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README
3 *
4 * Trivial changes by Alan Cox to add the LFS fixes
5 *
6 * Trivial Changes:
7 * Rights granted to Hans Reiser to redistribute under other terms providing
8 * he accepts all liability including but not limited to patent, fitness
9 * for purpose, and direct or indirect claims arising from failure to perform.
10 *
11 * NO WARRANTY
12 */
13
14 #include <linux/module.h>
15 #include <linux/vmalloc.h>
16 #include <linux/time.h>
17 #include <asm/uaccess.h>
18 #include <linux/reiserfs_fs.h>
19 #include <linux/reiserfs_acl.h>
20 #include <linux/reiserfs_xattr.h>
21 #include <linux/smp_lock.h>
22 #include <linux/init.h>
23 #include <linux/blkdev.h>
24 #include <linux/buffer_head.h>
25 #include <linux/vfs.h>
26 #include <linux/namespace.h>
27 #include <linux/mount.h>
28 #include <linux/namei.h>
29 #include <linux/quotaops.h>
30
31 struct file_system_type reiserfs_fs_type;
32
33 static const char reiserfs_3_5_magic_string[] = REISERFS_SUPER_MAGIC_STRING;
34 static const char reiserfs_3_6_magic_string[] = REISER2FS_SUPER_MAGIC_STRING;
35 static const char reiserfs_jr_magic_string[] = REISER2FS_JR_SUPER_MAGIC_STRING;
36
37 int is_reiserfs_3_5(struct reiserfs_super_block *rs)
38 {
39 return !strncmp(rs->s_v1.s_magic, reiserfs_3_5_magic_string,
40 strlen(reiserfs_3_5_magic_string));
41 }
42
43 int is_reiserfs_3_6(struct reiserfs_super_block *rs)
44 {
45 return !strncmp(rs->s_v1.s_magic, reiserfs_3_6_magic_string,
46 strlen(reiserfs_3_6_magic_string));
47 }
48
49 int is_reiserfs_jr(struct reiserfs_super_block *rs)
50 {
51 return !strncmp(rs->s_v1.s_magic, reiserfs_jr_magic_string,
52 strlen(reiserfs_jr_magic_string));
53 }
54
55 static int is_any_reiserfs_magic_string(struct reiserfs_super_block *rs)
56 {
57 return (is_reiserfs_3_5(rs) || is_reiserfs_3_6(rs) ||
58 is_reiserfs_jr(rs));
59 }
60
61 static int reiserfs_remount(struct super_block *s, int *flags, char *data);
62 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf);
63
64 static int reiserfs_sync_fs(struct super_block *s, int wait)
65 {
66 if (!(s->s_flags & MS_RDONLY)) {
67 struct reiserfs_transaction_handle th;
68 reiserfs_write_lock(s);
69 if (!journal_begin(&th, s, 1))
70 if (!journal_end_sync(&th, s, 1))
71 reiserfs_flush_old_commits(s);
72 s->s_dirt = 0; /* Even if it's not true.
73 * We'll loop forever in sync_supers otherwise */
74 reiserfs_write_unlock(s);
75 } else {
76 s->s_dirt = 0;
77 }
78 return 0;
79 }
80
81 static void reiserfs_write_super(struct super_block *s)
82 {
83 reiserfs_sync_fs(s, 1);
84 }
85
86 static void reiserfs_write_super_lockfs(struct super_block *s)
87 {
88 struct reiserfs_transaction_handle th;
89 reiserfs_write_lock(s);
90 if (!(s->s_flags & MS_RDONLY)) {
91 int err = journal_begin(&th, s, 1);
92 if (err) {
93 reiserfs_block_writes(&th);
94 } else {
95 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
96 1);
97 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
98 reiserfs_block_writes(&th);
99 journal_end_sync(&th, s, 1);
100 }
101 }
102 s->s_dirt = 0;
103 reiserfs_write_unlock(s);
104 }
105
106 static void reiserfs_unlockfs(struct super_block *s)
107 {
108 reiserfs_allow_writes(s);
109 }
110
111 extern const struct in_core_key MAX_IN_CORE_KEY;
112
113 /* this is used to delete "save link" when there are no items of a
114 file it points to. It can either happen if unlink is completed but
115 "save unlink" removal, or if file has both unlink and truncate
116 pending and as unlink completes first (because key of "save link"
117 protecting unlink is bigger that a key lf "save link" which
118 protects truncate), so there left no items to make truncate
119 completion on */
120 static int remove_save_link_only(struct super_block *s,
121 struct reiserfs_key *key, int oid_free)
122 {
123 struct reiserfs_transaction_handle th;
124 int err;
125
126 /* we are going to do one balancing */
127 err = journal_begin(&th, s, JOURNAL_PER_BALANCE_CNT);
128 if (err)
129 return err;
130
131 reiserfs_delete_solid_item(&th, NULL, key);
132 if (oid_free)
133 /* removals are protected by direct items */
134 reiserfs_release_objectid(&th, le32_to_cpu(key->k_objectid));
135
136 return journal_end(&th, s, JOURNAL_PER_BALANCE_CNT);
137 }
138
139 #ifdef CONFIG_QUOTA
140 static int reiserfs_quota_on_mount(struct super_block *, int);
141 #endif
142
143 /* look for uncompleted unlinks and truncates and complete them */
144 static int finish_unfinished(struct super_block *s)
145 {
146 INITIALIZE_PATH(path);
147 struct cpu_key max_cpu_key, obj_key;
148 struct reiserfs_key save_link_key;
149 int retval = 0;
150 struct item_head *ih;
151 struct buffer_head *bh;
152 int item_pos;
153 char *item;
154 int done;
155 struct inode *inode;
156 int truncate;
157 #ifdef CONFIG_QUOTA
158 int i;
159 int ms_active_set;
160 #endif
161
162 /* compose key to look for "save" links */
163 max_cpu_key.version = KEY_FORMAT_3_5;
164 max_cpu_key.on_disk_key.k_dir_id = ~0U;
165 max_cpu_key.on_disk_key.k_objectid = ~0U;
166 set_cpu_key_k_offset(&max_cpu_key, ~0U);
167 max_cpu_key.key_length = 3;
168
169 #ifdef CONFIG_QUOTA
170 /* Needed for iput() to work correctly and not trash data */
171 if (s->s_flags & MS_ACTIVE) {
172 ms_active_set = 0;
173 } else {
174 ms_active_set = 1;
175 s->s_flags |= MS_ACTIVE;
176 }
177 /* Turn on quotas so that they are updated correctly */
178 for (i = 0; i < MAXQUOTAS; i++) {
179 if (REISERFS_SB(s)->s_qf_names[i]) {
180 int ret = reiserfs_quota_on_mount(s, i);
181 if (ret < 0)
182 reiserfs_warning(s,
183 "reiserfs: cannot turn on journalled quota: error %d",
184 ret);
185 }
186 }
187 #endif
188
189 done = 0;
190 REISERFS_SB(s)->s_is_unlinked_ok = 1;
191 while (!retval) {
192 retval = search_item(s, &max_cpu_key, &path);
193 if (retval != ITEM_NOT_FOUND) {
194 reiserfs_warning(s,
195 "vs-2140: finish_unfinished: search_by_key returned %d",
196 retval);
197 break;
198 }
199
200 bh = get_last_bh(&path);
201 item_pos = get_item_pos(&path);
202 if (item_pos != B_NR_ITEMS(bh)) {
203 reiserfs_warning(s,
204 "vs-2060: finish_unfinished: wrong position found");
205 break;
206 }
207 item_pos--;
208 ih = B_N_PITEM_HEAD(bh, item_pos);
209
210 if (le32_to_cpu(ih->ih_key.k_dir_id) != MAX_KEY_OBJECTID)
211 /* there are no "save" links anymore */
212 break;
213
214 save_link_key = ih->ih_key;
215 if (is_indirect_le_ih(ih))
216 truncate = 1;
217 else
218 truncate = 0;
219
220 /* reiserfs_iget needs k_dirid and k_objectid only */
221 item = B_I_PITEM(bh, ih);
222 obj_key.on_disk_key.k_dir_id = le32_to_cpu(*(__le32 *) item);
223 obj_key.on_disk_key.k_objectid =
224 le32_to_cpu(ih->ih_key.k_objectid);
225 obj_key.on_disk_key.k_offset = 0;
226 obj_key.on_disk_key.k_type = 0;
227
228 pathrelse(&path);
229
230 inode = reiserfs_iget(s, &obj_key);
231 if (!inode) {
232 /* the unlink almost completed, it just did not manage to remove
233 "save" link and release objectid */
234 reiserfs_warning(s,
235 "vs-2180: finish_unfinished: iget failed for %K",
236 &obj_key);
237 retval = remove_save_link_only(s, &save_link_key, 1);
238 continue;
239 }
240
241 if (!truncate && inode->i_nlink) {
242 /* file is not unlinked */
243 reiserfs_warning(s,
244 "vs-2185: finish_unfinished: file %K is not unlinked",
245 &obj_key);
246 retval = remove_save_link_only(s, &save_link_key, 0);
247 continue;
248 }
249 DQUOT_INIT(inode);
250
251 if (truncate && S_ISDIR(inode->i_mode)) {
252 /* We got a truncate request for a dir which is impossible.
253 The only imaginable way is to execute unfinished truncate request
254 then boot into old kernel, remove the file and create dir with
255 the same key. */
256 reiserfs_warning(s,
257 "green-2101: impossible truncate on a directory %k. Please report",
258 INODE_PKEY(inode));
259 retval = remove_save_link_only(s, &save_link_key, 0);
260 truncate = 0;
261 iput(inode);
262 continue;
263 }
264
265 if (truncate) {
266 REISERFS_I(inode)->i_flags |=
267 i_link_saved_truncate_mask;
268 /* not completed truncate found. New size was committed together
269 with "save" link */
270 reiserfs_info(s, "Truncating %k to %Ld ..",
271 INODE_PKEY(inode), inode->i_size);
272 reiserfs_truncate_file(inode,
273 0
274 /*don't update modification time */
275 );
276 retval = remove_save_link(inode, truncate);
277 } else {
278 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
279 /* not completed unlink (rmdir) found */
280 reiserfs_info(s, "Removing %k..", INODE_PKEY(inode));
281 /* removal gets completed in iput */
282 retval = 0;
283 }
284
285 iput(inode);
286 printk("done\n");
287 done++;
288 }
289 REISERFS_SB(s)->s_is_unlinked_ok = 0;
290
291 #ifdef CONFIG_QUOTA
292 /* Turn quotas off */
293 for (i = 0; i < MAXQUOTAS; i++) {
294 if (sb_dqopt(s)->files[i])
295 vfs_quota_off_mount(s, i);
296 }
297 if (ms_active_set)
298 /* Restore the flag back */
299 s->s_flags &= ~MS_ACTIVE;
300 #endif
301 pathrelse(&path);
302 if (done)
303 reiserfs_info(s, "There were %d uncompleted unlinks/truncates. "
304 "Completed\n", done);
305 return retval;
306 }
307
308 /* to protect file being unlinked from getting lost we "safe" link files
309 being unlinked. This link will be deleted in the same transaction with last
310 item of file. mounting the filesytem we scan all these links and remove
311 files which almost got lost */
312 void add_save_link(struct reiserfs_transaction_handle *th,
313 struct inode *inode, int truncate)
314 {
315 INITIALIZE_PATH(path);
316 int retval;
317 struct cpu_key key;
318 struct item_head ih;
319 __le32 link;
320
321 BUG_ON(!th->t_trans_id);
322
323 /* file can only get one "save link" of each kind */
324 RFALSE(truncate &&
325 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask),
326 "saved link already exists for truncated inode %lx",
327 (long)inode->i_ino);
328 RFALSE(!truncate &&
329 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask),
330 "saved link already exists for unlinked inode %lx",
331 (long)inode->i_ino);
332
333 /* setup key of "save" link */
334 key.version = KEY_FORMAT_3_5;
335 key.on_disk_key.k_dir_id = MAX_KEY_OBJECTID;
336 key.on_disk_key.k_objectid = inode->i_ino;
337 if (!truncate) {
338 /* unlink, rmdir, rename */
339 set_cpu_key_k_offset(&key, 1 + inode->i_sb->s_blocksize);
340 set_cpu_key_k_type(&key, TYPE_DIRECT);
341
342 /* item head of "safe" link */
343 make_le_item_head(&ih, &key, key.version,
344 1 + inode->i_sb->s_blocksize, TYPE_DIRECT,
345 4 /*length */ , 0xffff /*free space */ );
346 } else {
347 /* truncate */
348 if (S_ISDIR(inode->i_mode))
349 reiserfs_warning(inode->i_sb,
350 "green-2102: Adding a truncate savelink for a directory %k! Please report",
351 INODE_PKEY(inode));
352 set_cpu_key_k_offset(&key, 1);
353 set_cpu_key_k_type(&key, TYPE_INDIRECT);
354
355 /* item head of "safe" link */
356 make_le_item_head(&ih, &key, key.version, 1, TYPE_INDIRECT,
357 4 /*length */ , 0 /*free space */ );
358 }
359 key.key_length = 3;
360
361 /* look for its place in the tree */
362 retval = search_item(inode->i_sb, &key, &path);
363 if (retval != ITEM_NOT_FOUND) {
364 if (retval != -ENOSPC)
365 reiserfs_warning(inode->i_sb, "vs-2100: add_save_link:"
366 "search_by_key (%K) returned %d", &key,
367 retval);
368 pathrelse(&path);
369 return;
370 }
371
372 /* body of "save" link */
373 link = INODE_PKEY(inode)->k_dir_id;
374
375 /* put "save" link inot tree, don't charge quota to anyone */
376 retval =
377 reiserfs_insert_item(th, &path, &key, &ih, NULL, (char *)&link);
378 if (retval) {
379 if (retval != -ENOSPC)
380 reiserfs_warning(inode->i_sb,
381 "vs-2120: add_save_link: insert_item returned %d",
382 retval);
383 } else {
384 if (truncate)
385 REISERFS_I(inode)->i_flags |=
386 i_link_saved_truncate_mask;
387 else
388 REISERFS_I(inode)->i_flags |= i_link_saved_unlink_mask;
389 }
390 }
391
392 /* this opens transaction unlike add_save_link */
393 int remove_save_link(struct inode *inode, int truncate)
394 {
395 struct reiserfs_transaction_handle th;
396 struct reiserfs_key key;
397 int err;
398
399 /* we are going to do one balancing only */
400 err = journal_begin(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
401 if (err)
402 return err;
403
404 /* setup key of "save" link */
405 key.k_dir_id = cpu_to_le32(MAX_KEY_OBJECTID);
406 key.k_objectid = INODE_PKEY(inode)->k_objectid;
407 if (!truncate) {
408 /* unlink, rmdir, rename */
409 set_le_key_k_offset(KEY_FORMAT_3_5, &key,
410 1 + inode->i_sb->s_blocksize);
411 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_DIRECT);
412 } else {
413 /* truncate */
414 set_le_key_k_offset(KEY_FORMAT_3_5, &key, 1);
415 set_le_key_k_type(KEY_FORMAT_3_5, &key, TYPE_INDIRECT);
416 }
417
418 if ((truncate &&
419 (REISERFS_I(inode)->i_flags & i_link_saved_truncate_mask)) ||
420 (!truncate &&
421 (REISERFS_I(inode)->i_flags & i_link_saved_unlink_mask)))
422 /* don't take quota bytes from anywhere */
423 reiserfs_delete_solid_item(&th, NULL, &key);
424 if (!truncate) {
425 reiserfs_release_objectid(&th, inode->i_ino);
426 REISERFS_I(inode)->i_flags &= ~i_link_saved_unlink_mask;
427 } else
428 REISERFS_I(inode)->i_flags &= ~i_link_saved_truncate_mask;
429
430 return journal_end(&th, inode->i_sb, JOURNAL_PER_BALANCE_CNT);
431 }
432
433 static void reiserfs_put_super(struct super_block *s)
434 {
435 int i;
436 struct reiserfs_transaction_handle th;
437 th.t_trans_id = 0;
438
439 if (REISERFS_SB(s)->xattr_root) {
440 d_invalidate(REISERFS_SB(s)->xattr_root);
441 dput(REISERFS_SB(s)->xattr_root);
442 }
443
444 if (REISERFS_SB(s)->priv_root) {
445 d_invalidate(REISERFS_SB(s)->priv_root);
446 dput(REISERFS_SB(s)->priv_root);
447 }
448
449 /* change file system state to current state if it was mounted with read-write permissions */
450 if (!(s->s_flags & MS_RDONLY)) {
451 if (!journal_begin(&th, s, 10)) {
452 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s),
453 1);
454 set_sb_umount_state(SB_DISK_SUPER_BLOCK(s),
455 REISERFS_SB(s)->s_mount_state);
456 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
457 }
458 }
459
460 /* note, journal_release checks for readonly mount, and can decide not
461 ** to do a journal_end
462 */
463 journal_release(&th, s);
464
465 for (i = 0; i < SB_BMAP_NR(s); i++)
466 brelse(SB_AP_BITMAP(s)[i].bh);
467
468 vfree(SB_AP_BITMAP(s));
469
470 brelse(SB_BUFFER_WITH_SB(s));
471
472 print_statistics(s);
473
474 if (REISERFS_SB(s)->reserved_blocks != 0) {
475 reiserfs_warning(s,
476 "green-2005: reiserfs_put_super: reserved blocks left %d",
477 REISERFS_SB(s)->reserved_blocks);
478 }
479
480 reiserfs_proc_info_done(s);
481
482 kfree(s->s_fs_info);
483 s->s_fs_info = NULL;
484
485 return;
486 }
487
488 static kmem_cache_t *reiserfs_inode_cachep;
489
490 static struct inode *reiserfs_alloc_inode(struct super_block *sb)
491 {
492 struct reiserfs_inode_info *ei;
493 ei = (struct reiserfs_inode_info *)
494 kmem_cache_alloc(reiserfs_inode_cachep, SLAB_KERNEL);
495 if (!ei)
496 return NULL;
497 return &ei->vfs_inode;
498 }
499
500 static void reiserfs_destroy_inode(struct inode *inode)
501 {
502 kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
503 }
504
505 static void init_once(void *foo, kmem_cache_t * cachep, unsigned long flags)
506 {
507 struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
508
509 if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) ==
510 SLAB_CTOR_CONSTRUCTOR) {
511 INIT_LIST_HEAD(&ei->i_prealloc_list);
512 inode_init_once(&ei->vfs_inode);
513 ei->i_acl_access = NULL;
514 ei->i_acl_default = NULL;
515 }
516 }
517
518 static int init_inodecache(void)
519 {
520 reiserfs_inode_cachep = kmem_cache_create("reiser_inode_cache",
521 sizeof(struct
522 reiserfs_inode_info),
523 0, (SLAB_RECLAIM_ACCOUNT|
524 SLAB_MEM_SPREAD),
525 init_once, NULL);
526 if (reiserfs_inode_cachep == NULL)
527 return -ENOMEM;
528 return 0;
529 }
530
531 static void destroy_inodecache(void)
532 {
533 kmem_cache_destroy(reiserfs_inode_cachep);
534 }
535
536 /* we don't mark inodes dirty, we just log them */
537 static void reiserfs_dirty_inode(struct inode *inode)
538 {
539 struct reiserfs_transaction_handle th;
540
541 int err = 0;
542 if (inode->i_sb->s_flags & MS_RDONLY) {
543 reiserfs_warning(inode->i_sb,
544 "clm-6006: writing inode %lu on readonly FS",
545 inode->i_ino);
546 return;
547 }
548 reiserfs_write_lock(inode->i_sb);
549
550 /* this is really only used for atime updates, so they don't have
551 ** to be included in O_SYNC or fsync
552 */
553 err = journal_begin(&th, inode->i_sb, 1);
554 if (err) {
555 reiserfs_write_unlock(inode->i_sb);
556 return;
557 }
558 reiserfs_update_sd(&th, inode);
559 journal_end(&th, inode->i_sb, 1);
560 reiserfs_write_unlock(inode->i_sb);
561 }
562
563 static void reiserfs_clear_inode(struct inode *inode)
564 {
565 struct posix_acl *acl;
566
567 acl = REISERFS_I(inode)->i_acl_access;
568 if (acl && !IS_ERR(acl))
569 posix_acl_release(acl);
570 REISERFS_I(inode)->i_acl_access = NULL;
571
572 acl = REISERFS_I(inode)->i_acl_default;
573 if (acl && !IS_ERR(acl))
574 posix_acl_release(acl);
575 REISERFS_I(inode)->i_acl_default = NULL;
576 }
577
578 #ifdef CONFIG_QUOTA
579 static ssize_t reiserfs_quota_write(struct super_block *, int, const char *,
580 size_t, loff_t);
581 static ssize_t reiserfs_quota_read(struct super_block *, int, char *, size_t,
582 loff_t);
583 #endif
584
585 static struct super_operations reiserfs_sops = {
586 .alloc_inode = reiserfs_alloc_inode,
587 .destroy_inode = reiserfs_destroy_inode,
588 .write_inode = reiserfs_write_inode,
589 .dirty_inode = reiserfs_dirty_inode,
590 .delete_inode = reiserfs_delete_inode,
591 .clear_inode = reiserfs_clear_inode,
592 .put_super = reiserfs_put_super,
593 .write_super = reiserfs_write_super,
594 .sync_fs = reiserfs_sync_fs,
595 .write_super_lockfs = reiserfs_write_super_lockfs,
596 .unlockfs = reiserfs_unlockfs,
597 .statfs = reiserfs_statfs,
598 .remount_fs = reiserfs_remount,
599 #ifdef CONFIG_QUOTA
600 .quota_read = reiserfs_quota_read,
601 .quota_write = reiserfs_quota_write,
602 #endif
603 };
604
605 #ifdef CONFIG_QUOTA
606 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
607
608 static int reiserfs_dquot_initialize(struct inode *, int);
609 static int reiserfs_dquot_drop(struct inode *);
610 static int reiserfs_write_dquot(struct dquot *);
611 static int reiserfs_acquire_dquot(struct dquot *);
612 static int reiserfs_release_dquot(struct dquot *);
613 static int reiserfs_mark_dquot_dirty(struct dquot *);
614 static int reiserfs_write_info(struct super_block *, int);
615 static int reiserfs_quota_on(struct super_block *, int, int, char *);
616
617 static struct dquot_operations reiserfs_quota_operations = {
618 .initialize = reiserfs_dquot_initialize,
619 .drop = reiserfs_dquot_drop,
620 .alloc_space = dquot_alloc_space,
621 .alloc_inode = dquot_alloc_inode,
622 .free_space = dquot_free_space,
623 .free_inode = dquot_free_inode,
624 .transfer = dquot_transfer,
625 .write_dquot = reiserfs_write_dquot,
626 .acquire_dquot = reiserfs_acquire_dquot,
627 .release_dquot = reiserfs_release_dquot,
628 .mark_dirty = reiserfs_mark_dquot_dirty,
629 .write_info = reiserfs_write_info,
630 };
631
632 static struct quotactl_ops reiserfs_qctl_operations = {
633 .quota_on = reiserfs_quota_on,
634 .quota_off = vfs_quota_off,
635 .quota_sync = vfs_quota_sync,
636 .get_info = vfs_get_dqinfo,
637 .set_info = vfs_set_dqinfo,
638 .get_dqblk = vfs_get_dqblk,
639 .set_dqblk = vfs_set_dqblk,
640 };
641 #endif
642
643 static struct export_operations reiserfs_export_ops = {
644 .encode_fh = reiserfs_encode_fh,
645 .decode_fh = reiserfs_decode_fh,
646 .get_parent = reiserfs_get_parent,
647 .get_dentry = reiserfs_get_dentry,
648 };
649
650 /* this struct is used in reiserfs_getopt () for containing the value for those
651 mount options that have values rather than being toggles. */
652 typedef struct {
653 char *value;
654 int setmask; /* bitmask which is to set on mount_options bitmask when this
655 value is found, 0 is no bits are to be changed. */
656 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
657 value is found, 0 is no bits are to be changed. This is
658 applied BEFORE setmask */
659 } arg_desc_t;
660
661 /* Set this bit in arg_required to allow empty arguments */
662 #define REISERFS_OPT_ALLOWEMPTY 31
663
664 /* this struct is used in reiserfs_getopt() for describing the set of reiserfs
665 mount options */
666 typedef struct {
667 char *option_name;
668 int arg_required; /* 0 if argument is not required, not 0 otherwise */
669 const arg_desc_t *values; /* list of values accepted by an option */
670 int setmask; /* bitmask which is to set on mount_options bitmask when this
671 value is found, 0 is no bits are to be changed. */
672 int clrmask; /* bitmask which is to clear on mount_options bitmask when this
673 value is found, 0 is no bits are to be changed. This is
674 applied BEFORE setmask */
675 } opt_desc_t;
676
677 /* possible values for -o data= */
678 static const arg_desc_t logging_mode[] = {
679 {"ordered", 1 << REISERFS_DATA_ORDERED,
680 (1 << REISERFS_DATA_LOG | 1 << REISERFS_DATA_WRITEBACK)},
681 {"journal", 1 << REISERFS_DATA_LOG,
682 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_WRITEBACK)},
683 {"writeback", 1 << REISERFS_DATA_WRITEBACK,
684 (1 << REISERFS_DATA_ORDERED | 1 << REISERFS_DATA_LOG)},
685 {.value = NULL}
686 };
687
688 /* possible values for -o barrier= */
689 static const arg_desc_t barrier_mode[] = {
690 {"none", 1 << REISERFS_BARRIER_NONE, 1 << REISERFS_BARRIER_FLUSH},
691 {"flush", 1 << REISERFS_BARRIER_FLUSH, 1 << REISERFS_BARRIER_NONE},
692 {.value = NULL}
693 };
694
695 /* possible values for "-o block-allocator=" and bits which are to be set in
696 s_mount_opt of reiserfs specific part of in-core super block */
697 static const arg_desc_t balloc[] = {
698 {"noborder", 1 << REISERFS_NO_BORDER, 0},
699 {"border", 0, 1 << REISERFS_NO_BORDER},
700 {"no_unhashed_relocation", 1 << REISERFS_NO_UNHASHED_RELOCATION, 0},
701 {"hashed_relocation", 1 << REISERFS_HASHED_RELOCATION, 0},
702 {"test4", 1 << REISERFS_TEST4, 0},
703 {"notest4", 0, 1 << REISERFS_TEST4},
704 {NULL, 0, 0}
705 };
706
707 static const arg_desc_t tails[] = {
708 {"on", 1 << REISERFS_LARGETAIL, 1 << REISERFS_SMALLTAIL},
709 {"off", 0, (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
710 {"small", 1 << REISERFS_SMALLTAIL, 1 << REISERFS_LARGETAIL},
711 {NULL, 0, 0}
712 };
713
714 static const arg_desc_t error_actions[] = {
715 {"panic", 1 << REISERFS_ERROR_PANIC,
716 (1 << REISERFS_ERROR_RO | 1 << REISERFS_ERROR_CONTINUE)},
717 {"ro-remount", 1 << REISERFS_ERROR_RO,
718 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_CONTINUE)},
719 #ifdef REISERFS_JOURNAL_ERROR_ALLOWS_NO_LOG
720 {"continue", 1 << REISERFS_ERROR_CONTINUE,
721 (1 << REISERFS_ERROR_PANIC | 1 << REISERFS_ERROR_RO)},
722 #endif
723 {NULL, 0, 0},
724 };
725
726 int reiserfs_default_io_size = 128 * 1024; /* Default recommended I/O size is 128k.
727 There might be broken applications that are
728 confused by this. Use nolargeio mount option
729 to get usual i/o size = PAGE_SIZE.
730 */
731
732 /* proceed only one option from a list *cur - string containing of mount options
733 opts - array of options which are accepted
734 opt_arg - if option is found and requires an argument and if it is specifed
735 in the input - pointer to the argument is stored here
736 bit_flags - if option requires to set a certain bit - it is set here
737 return -1 if unknown option is found, opt->arg_required otherwise */
738 static int reiserfs_getopt(struct super_block *s, char **cur, opt_desc_t * opts,
739 char **opt_arg, unsigned long *bit_flags)
740 {
741 char *p;
742 /* foo=bar,
743 ^ ^ ^
744 | | +-- option_end
745 | +-- arg_start
746 +-- option_start
747 */
748 const opt_desc_t *opt;
749 const arg_desc_t *arg;
750
751 p = *cur;
752
753 /* assume argument cannot contain commas */
754 *cur = strchr(p, ',');
755 if (*cur) {
756 *(*cur) = '\0';
757 (*cur)++;
758 }
759
760 if (!strncmp(p, "alloc=", 6)) {
761 /* Ugly special case, probably we should redo options parser so that
762 it can understand several arguments for some options, also so that
763 it can fill several bitfields with option values. */
764 if (reiserfs_parse_alloc_options(s, p + 6)) {
765 return -1;
766 } else {
767 return 0;
768 }
769 }
770
771 /* for every option in the list */
772 for (opt = opts; opt->option_name; opt++) {
773 if (!strncmp(p, opt->option_name, strlen(opt->option_name))) {
774 if (bit_flags) {
775 if (opt->clrmask ==
776 (1 << REISERFS_UNSUPPORTED_OPT))
777 reiserfs_warning(s, "%s not supported.",
778 p);
779 else
780 *bit_flags &= ~opt->clrmask;
781 if (opt->setmask ==
782 (1 << REISERFS_UNSUPPORTED_OPT))
783 reiserfs_warning(s, "%s not supported.",
784 p);
785 else
786 *bit_flags |= opt->setmask;
787 }
788 break;
789 }
790 }
791 if (!opt->option_name) {
792 reiserfs_warning(s, "unknown mount option \"%s\"", p);
793 return -1;
794 }
795
796 p += strlen(opt->option_name);
797 switch (*p) {
798 case '=':
799 if (!opt->arg_required) {
800 reiserfs_warning(s,
801 "the option \"%s\" does not require an argument",
802 opt->option_name);
803 return -1;
804 }
805 break;
806
807 case 0:
808 if (opt->arg_required) {
809 reiserfs_warning(s,
810 "the option \"%s\" requires an argument",
811 opt->option_name);
812 return -1;
813 }
814 break;
815 default:
816 reiserfs_warning(s, "head of option \"%s\" is only correct",
817 opt->option_name);
818 return -1;
819 }
820
821 /* move to the argument, or to next option if argument is not required */
822 p++;
823
824 if (opt->arg_required
825 && !(opt->arg_required & (1 << REISERFS_OPT_ALLOWEMPTY))
826 && !strlen(p)) {
827 /* this catches "option=," if not allowed */
828 reiserfs_warning(s, "empty argument for \"%s\"",
829 opt->option_name);
830 return -1;
831 }
832
833 if (!opt->values) {
834 /* *=NULLopt_arg contains pointer to argument */
835 *opt_arg = p;
836 return opt->arg_required & ~(1 << REISERFS_OPT_ALLOWEMPTY);
837 }
838
839 /* values possible for this option are listed in opt->values */
840 for (arg = opt->values; arg->value; arg++) {
841 if (!strcmp(p, arg->value)) {
842 if (bit_flags) {
843 *bit_flags &= ~arg->clrmask;
844 *bit_flags |= arg->setmask;
845 }
846 return opt->arg_required;
847 }
848 }
849
850 reiserfs_warning(s, "bad value \"%s\" for option \"%s\"", p,
851 opt->option_name);
852 return -1;
853 }
854
855 /* returns 0 if something is wrong in option string, 1 - otherwise */
856 static int reiserfs_parse_options(struct super_block *s, char *options, /* string given via mount's -o */
857 unsigned long *mount_options,
858 /* after the parsing phase, contains the
859 collection of bitflags defining what
860 mount options were selected. */
861 unsigned long *blocks, /* strtol-ed from NNN of resize=NNN */
862 char **jdev_name,
863 unsigned int *commit_max_age)
864 {
865 int c;
866 char *arg = NULL;
867 char *pos;
868 opt_desc_t opts[] = {
869 /* Compatibility stuff, so that -o notail for old setups still work */
870 {"tails",.arg_required = 't',.values = tails},
871 {"notail",.clrmask =
872 (1 << REISERFS_LARGETAIL) | (1 << REISERFS_SMALLTAIL)},
873 {"conv",.setmask = 1 << REISERFS_CONVERT},
874 {"attrs",.setmask = 1 << REISERFS_ATTRS},
875 {"noattrs",.clrmask = 1 << REISERFS_ATTRS},
876 #ifdef CONFIG_REISERFS_FS_XATTR
877 {"user_xattr",.setmask = 1 << REISERFS_XATTRS_USER},
878 {"nouser_xattr",.clrmask = 1 << REISERFS_XATTRS_USER},
879 #else
880 {"user_xattr",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
881 {"nouser_xattr",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
882 #endif
883 #ifdef CONFIG_REISERFS_FS_POSIX_ACL
884 {"acl",.setmask = 1 << REISERFS_POSIXACL},
885 {"noacl",.clrmask = 1 << REISERFS_POSIXACL},
886 #else
887 {"acl",.setmask = 1 << REISERFS_UNSUPPORTED_OPT},
888 {"noacl",.clrmask = 1 << REISERFS_UNSUPPORTED_OPT},
889 #endif
890 {.option_name = "nolog"},
891 {"replayonly",.setmask = 1 << REPLAYONLY},
892 {"block-allocator",.arg_required = 'a',.values = balloc},
893 {"data",.arg_required = 'd',.values = logging_mode},
894 {"barrier",.arg_required = 'b',.values = barrier_mode},
895 {"resize",.arg_required = 'r',.values = NULL},
896 {"jdev",.arg_required = 'j',.values = NULL},
897 {"nolargeio",.arg_required = 'w',.values = NULL},
898 {"commit",.arg_required = 'c',.values = NULL},
899 {"usrquota",.setmask = 1 << REISERFS_QUOTA},
900 {"grpquota",.setmask = 1 << REISERFS_QUOTA},
901 {"noquota",.clrmask = 1 << REISERFS_QUOTA},
902 {"errors",.arg_required = 'e',.values = error_actions},
903 {"usrjquota",.arg_required =
904 'u' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
905 {"grpjquota",.arg_required =
906 'g' | (1 << REISERFS_OPT_ALLOWEMPTY),.values = NULL},
907 {"jqfmt",.arg_required = 'f',.values = NULL},
908 {.option_name = NULL}
909 };
910
911 *blocks = 0;
912 if (!options || !*options)
913 /* use default configuration: create tails, journaling on, no
914 conversion to newest format */
915 return 1;
916
917 for (pos = options; pos;) {
918 c = reiserfs_getopt(s, &pos, opts, &arg, mount_options);
919 if (c == -1)
920 /* wrong option is given */
921 return 0;
922
923 if (c == 'r') {
924 char *p;
925
926 p = NULL;
927 /* "resize=NNN" or "resize=auto" */
928
929 if (!strcmp(arg, "auto")) {
930 /* From JFS code, to auto-get the size. */
931 *blocks =
932 s->s_bdev->bd_inode->i_size >> s->
933 s_blocksize_bits;
934 } else {
935 *blocks = simple_strtoul(arg, &p, 0);
936 if (*p != '\0') {
937 /* NNN does not look like a number */
938 reiserfs_warning(s,
939 "reiserfs_parse_options: bad value %s",
940 arg);
941 return 0;
942 }
943 }
944 }
945
946 if (c == 'c') {
947 char *p = NULL;
948 unsigned long val = simple_strtoul(arg, &p, 0);
949 /* commit=NNN (time in seconds) */
950 if (*p != '\0' || val >= (unsigned int)-1) {
951 reiserfs_warning(s,
952 "reiserfs_parse_options: bad value %s",
953 arg);
954 return 0;
955 }
956 *commit_max_age = (unsigned int)val;
957 }
958
959 if (c == 'w') {
960 char *p = NULL;
961 int val = simple_strtoul(arg, &p, 0);
962
963 if (*p != '\0') {
964 reiserfs_warning(s,
965 "reiserfs_parse_options: non-numeric value %s for nolargeio option",
966 arg);
967 return 0;
968 }
969 if (val)
970 reiserfs_default_io_size = PAGE_SIZE;
971 else
972 reiserfs_default_io_size = 128 * 1024;
973 }
974
975 if (c == 'j') {
976 if (arg && *arg && jdev_name) {
977 if (*jdev_name) { //Hm, already assigned?
978 reiserfs_warning(s,
979 "reiserfs_parse_options: journal device was already specified to be %s",
980 *jdev_name);
981 return 0;
982 }
983 *jdev_name = arg;
984 }
985 }
986 #ifdef CONFIG_QUOTA
987 if (c == 'u' || c == 'g') {
988 int qtype = c == 'u' ? USRQUOTA : GRPQUOTA;
989
990 if (sb_any_quota_enabled(s)) {
991 reiserfs_warning(s,
992 "reiserfs_parse_options: cannot change journalled quota options when quota turned on.");
993 return 0;
994 }
995 if (*arg) { /* Some filename specified? */
996 if (REISERFS_SB(s)->s_qf_names[qtype]
997 && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
998 arg)) {
999 reiserfs_warning(s,
1000 "reiserfs_parse_options: %s quota file already specified.",
1001 QTYPE2NAME(qtype));
1002 return 0;
1003 }
1004 if (strchr(arg, '/')) {
1005 reiserfs_warning(s,
1006 "reiserfs_parse_options: quotafile must be on filesystem root.");
1007 return 0;
1008 }
1009 REISERFS_SB(s)->s_qf_names[qtype] =
1010 kmalloc(strlen(arg) + 1, GFP_KERNEL);
1011 if (!REISERFS_SB(s)->s_qf_names[qtype]) {
1012 reiserfs_warning(s,
1013 "reiserfs_parse_options: not enough memory for storing quotafile name.");
1014 return 0;
1015 }
1016 strcpy(REISERFS_SB(s)->s_qf_names[qtype], arg);
1017 *mount_options |= 1 << REISERFS_QUOTA;
1018 } else {
1019 kfree(REISERFS_SB(s)->s_qf_names[qtype]);
1020 REISERFS_SB(s)->s_qf_names[qtype] = NULL;
1021 }
1022 }
1023 if (c == 'f') {
1024 if (!strcmp(arg, "vfsold"))
1025 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_OLD;
1026 else if (!strcmp(arg, "vfsv0"))
1027 REISERFS_SB(s)->s_jquota_fmt = QFMT_VFS_V0;
1028 else {
1029 reiserfs_warning(s,
1030 "reiserfs_parse_options: unknown quota format specified.");
1031 return 0;
1032 }
1033 }
1034 #else
1035 if (c == 'u' || c == 'g' || c == 'f') {
1036 reiserfs_warning(s,
1037 "reiserfs_parse_options: journalled quota options not supported.");
1038 return 0;
1039 }
1040 #endif
1041 }
1042
1043 #ifdef CONFIG_QUOTA
1044 if (!REISERFS_SB(s)->s_jquota_fmt
1045 && (REISERFS_SB(s)->s_qf_names[USRQUOTA]
1046 || REISERFS_SB(s)->s_qf_names[GRPQUOTA])) {
1047 reiserfs_warning(s,
1048 "reiserfs_parse_options: journalled quota format not specified.");
1049 return 0;
1050 }
1051 /* This checking is not precise wrt the quota type but for our purposes it is sufficient */
1052 if (!(*mount_options & (1 << REISERFS_QUOTA))
1053 && sb_any_quota_enabled(s)) {
1054 reiserfs_warning(s,
1055 "reiserfs_parse_options: quota options must be present when quota is turned on.");
1056 return 0;
1057 }
1058 #endif
1059
1060 return 1;
1061 }
1062
1063 static void switch_data_mode(struct super_block *s, unsigned long mode)
1064 {
1065 REISERFS_SB(s)->s_mount_opt &= ~((1 << REISERFS_DATA_LOG) |
1066 (1 << REISERFS_DATA_ORDERED) |
1067 (1 << REISERFS_DATA_WRITEBACK));
1068 REISERFS_SB(s)->s_mount_opt |= (1 << mode);
1069 }
1070
1071 static void handle_data_mode(struct super_block *s, unsigned long mount_options)
1072 {
1073 if (mount_options & (1 << REISERFS_DATA_LOG)) {
1074 if (!reiserfs_data_log(s)) {
1075 switch_data_mode(s, REISERFS_DATA_LOG);
1076 reiserfs_info(s, "switching to journaled data mode\n");
1077 }
1078 } else if (mount_options & (1 << REISERFS_DATA_ORDERED)) {
1079 if (!reiserfs_data_ordered(s)) {
1080 switch_data_mode(s, REISERFS_DATA_ORDERED);
1081 reiserfs_info(s, "switching to ordered data mode\n");
1082 }
1083 } else if (mount_options & (1 << REISERFS_DATA_WRITEBACK)) {
1084 if (!reiserfs_data_writeback(s)) {
1085 switch_data_mode(s, REISERFS_DATA_WRITEBACK);
1086 reiserfs_info(s, "switching to writeback data mode\n");
1087 }
1088 }
1089 }
1090
1091 static void handle_barrier_mode(struct super_block *s, unsigned long bits)
1092 {
1093 int flush = (1 << REISERFS_BARRIER_FLUSH);
1094 int none = (1 << REISERFS_BARRIER_NONE);
1095 int all_barrier = flush | none;
1096
1097 if (bits & all_barrier) {
1098 REISERFS_SB(s)->s_mount_opt &= ~all_barrier;
1099 if (bits & flush) {
1100 REISERFS_SB(s)->s_mount_opt |= flush;
1101 printk("reiserfs: enabling write barrier flush mode\n");
1102 } else if (bits & none) {
1103 REISERFS_SB(s)->s_mount_opt |= none;
1104 printk("reiserfs: write barriers turned off\n");
1105 }
1106 }
1107 }
1108
1109 static void handle_attrs(struct super_block *s)
1110 {
1111 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1112
1113 if (reiserfs_attrs(s)) {
1114 if (old_format_only(s)) {
1115 reiserfs_warning(s,
1116 "reiserfs: cannot support attributes on 3.5.x disk format");
1117 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1118 return;
1119 }
1120 if (!(le32_to_cpu(rs->s_flags) & reiserfs_attrs_cleared)) {
1121 reiserfs_warning(s,
1122 "reiserfs: cannot support attributes until flag is set in super-block");
1123 REISERFS_SB(s)->s_mount_opt &= ~(1 << REISERFS_ATTRS);
1124 }
1125 }
1126 }
1127
1128 static int reiserfs_remount(struct super_block *s, int *mount_flags, char *arg)
1129 {
1130 struct reiserfs_super_block *rs;
1131 struct reiserfs_transaction_handle th;
1132 unsigned long blocks;
1133 unsigned long mount_options = REISERFS_SB(s)->s_mount_opt;
1134 unsigned long safe_mask = 0;
1135 unsigned int commit_max_age = (unsigned int)-1;
1136 struct reiserfs_journal *journal = SB_JOURNAL(s);
1137 int err;
1138 #ifdef CONFIG_QUOTA
1139 int i;
1140 #endif
1141
1142 rs = SB_DISK_SUPER_BLOCK(s);
1143
1144 if (!reiserfs_parse_options
1145 (s, arg, &mount_options, &blocks, NULL, &commit_max_age)) {
1146 #ifdef CONFIG_QUOTA
1147 for (i = 0; i < MAXQUOTAS; i++) {
1148 kfree(REISERFS_SB(s)->s_qf_names[i]);
1149 REISERFS_SB(s)->s_qf_names[i] = NULL;
1150 }
1151 #endif
1152 return -EINVAL;
1153 }
1154
1155 handle_attrs(s);
1156
1157 /* Add options that are safe here */
1158 safe_mask |= 1 << REISERFS_SMALLTAIL;
1159 safe_mask |= 1 << REISERFS_LARGETAIL;
1160 safe_mask |= 1 << REISERFS_NO_BORDER;
1161 safe_mask |= 1 << REISERFS_NO_UNHASHED_RELOCATION;
1162 safe_mask |= 1 << REISERFS_HASHED_RELOCATION;
1163 safe_mask |= 1 << REISERFS_TEST4;
1164 safe_mask |= 1 << REISERFS_ATTRS;
1165 safe_mask |= 1 << REISERFS_XATTRS_USER;
1166 safe_mask |= 1 << REISERFS_POSIXACL;
1167 safe_mask |= 1 << REISERFS_BARRIER_FLUSH;
1168 safe_mask |= 1 << REISERFS_BARRIER_NONE;
1169 safe_mask |= 1 << REISERFS_ERROR_RO;
1170 safe_mask |= 1 << REISERFS_ERROR_CONTINUE;
1171 safe_mask |= 1 << REISERFS_ERROR_PANIC;
1172 safe_mask |= 1 << REISERFS_QUOTA;
1173
1174 /* Update the bitmask, taking care to keep
1175 * the bits we're not allowed to change here */
1176 REISERFS_SB(s)->s_mount_opt =
1177 (REISERFS_SB(s)->
1178 s_mount_opt & ~safe_mask) | (mount_options & safe_mask);
1179
1180 if (commit_max_age != 0 && commit_max_age != (unsigned int)-1) {
1181 journal->j_max_commit_age = commit_max_age;
1182 journal->j_max_trans_age = commit_max_age;
1183 } else if (commit_max_age == 0) {
1184 /* 0 means restore defaults. */
1185 journal->j_max_commit_age = journal->j_default_max_commit_age;
1186 journal->j_max_trans_age = JOURNAL_MAX_TRANS_AGE;
1187 }
1188
1189 if (blocks) {
1190 int rc = reiserfs_resize(s, blocks);
1191 if (rc != 0)
1192 return rc;
1193 }
1194
1195 if (*mount_flags & MS_RDONLY) {
1196 reiserfs_xattr_init(s, *mount_flags);
1197 /* remount read-only */
1198 if (s->s_flags & MS_RDONLY)
1199 /* it is read-only already */
1200 return 0;
1201 /* try to remount file system with read-only permissions */
1202 if (sb_umount_state(rs) == REISERFS_VALID_FS
1203 || REISERFS_SB(s)->s_mount_state != REISERFS_VALID_FS) {
1204 return 0;
1205 }
1206
1207 err = journal_begin(&th, s, 10);
1208 if (err)
1209 return err;
1210
1211 /* Mounting a rw partition read-only. */
1212 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1213 set_sb_umount_state(rs, REISERFS_SB(s)->s_mount_state);
1214 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1215 } else {
1216 /* remount read-write */
1217 if (!(s->s_flags & MS_RDONLY)) {
1218 reiserfs_xattr_init(s, *mount_flags);
1219 return 0; /* We are read-write already */
1220 }
1221
1222 if (reiserfs_is_journal_aborted(journal))
1223 return journal->j_errno;
1224
1225 handle_data_mode(s, mount_options);
1226 handle_barrier_mode(s, mount_options);
1227 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1228 s->s_flags &= ~MS_RDONLY; /* now it is safe to call journal_begin */
1229 err = journal_begin(&th, s, 10);
1230 if (err)
1231 return err;
1232
1233 /* Mount a partition which is read-only, read-write */
1234 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1235 REISERFS_SB(s)->s_mount_state = sb_umount_state(rs);
1236 s->s_flags &= ~MS_RDONLY;
1237 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1238 /* mark_buffer_dirty (SB_BUFFER_WITH_SB (s), 1); */
1239 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1240 REISERFS_SB(s)->s_mount_state = REISERFS_VALID_FS;
1241 }
1242 /* this will force a full flush of all journal lists */
1243 SB_JOURNAL(s)->j_must_wait = 1;
1244 err = journal_end(&th, s, 10);
1245 if (err)
1246 return err;
1247 s->s_dirt = 0;
1248
1249 if (!(*mount_flags & MS_RDONLY)) {
1250 finish_unfinished(s);
1251 reiserfs_xattr_init(s, *mount_flags);
1252 }
1253
1254 return 0;
1255 }
1256
1257 /* load_bitmap_info_data - Sets up the reiserfs_bitmap_info structure from disk.
1258 * @sb - superblock for this filesystem
1259 * @bi - the bitmap info to be loaded. Requires that bi->bh is valid.
1260 *
1261 * This routine counts how many free bits there are, finding the first zero
1262 * as a side effect. Could also be implemented as a loop of test_bit() calls, or
1263 * a loop of find_first_zero_bit() calls. This implementation is similar to
1264 * find_first_zero_bit(), but doesn't return after it finds the first bit.
1265 * Should only be called on fs mount, but should be fairly efficient anyways.
1266 *
1267 * bi->first_zero_hint is considered unset if it == 0, since the bitmap itself
1268 * will * invariably occupt block 0 represented in the bitmap. The only
1269 * exception to this is when free_count also == 0, since there will be no
1270 * free blocks at all.
1271 */
1272
1273 static void load_bitmap_info_data(struct super_block *sb,
1274 struct reiserfs_bitmap_info *bi)
1275 {
1276 unsigned long *cur = (unsigned long *)bi->bh->b_data;
1277
1278 while ((char *)cur < (bi->bh->b_data + sb->s_blocksize)) {
1279
1280 /* No need to scan if all 0's or all 1's.
1281 * Since we're only counting 0's, we can simply ignore all 1's */
1282 if (*cur == 0) {
1283 if (bi->first_zero_hint == 0) {
1284 bi->first_zero_hint =
1285 ((char *)cur - bi->bh->b_data) << 3;
1286 }
1287 bi->free_count += sizeof(unsigned long) * 8;
1288 } else if (*cur != ~0L) {
1289 int b;
1290 for (b = 0; b < sizeof(unsigned long) * 8; b++) {
1291 if (!reiserfs_test_le_bit(b, cur)) {
1292 bi->free_count++;
1293 if (bi->first_zero_hint == 0)
1294 bi->first_zero_hint =
1295 (((char *)cur -
1296 bi->bh->b_data) << 3) + b;
1297 }
1298 }
1299 }
1300 cur++;
1301 }
1302
1303 #ifdef CONFIG_REISERFS_CHECK
1304 // This outputs a lot of unneded info on big FSes
1305 // reiserfs_warning ("bitmap loaded from block %d: %d free blocks",
1306 // bi->bh->b_blocknr, bi->free_count);
1307 #endif
1308 }
1309
1310 static int read_bitmaps(struct super_block *s)
1311 {
1312 int i, bmap_nr;
1313
1314 SB_AP_BITMAP(s) =
1315 vmalloc(sizeof(struct reiserfs_bitmap_info) * SB_BMAP_NR(s));
1316 if (SB_AP_BITMAP(s) == 0)
1317 return 1;
1318 memset(SB_AP_BITMAP(s), 0,
1319 sizeof(struct reiserfs_bitmap_info) * SB_BMAP_NR(s));
1320 for (i = 0, bmap_nr =
1321 REISERFS_DISK_OFFSET_IN_BYTES / s->s_blocksize + 1;
1322 i < SB_BMAP_NR(s); i++, bmap_nr = s->s_blocksize * 8 * i) {
1323 SB_AP_BITMAP(s)[i].bh = sb_getblk(s, bmap_nr);
1324 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh))
1325 ll_rw_block(READ, 1, &SB_AP_BITMAP(s)[i].bh);
1326 }
1327 for (i = 0; i < SB_BMAP_NR(s); i++) {
1328 wait_on_buffer(SB_AP_BITMAP(s)[i].bh);
1329 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
1330 reiserfs_warning(s, "sh-2029: reiserfs read_bitmaps: "
1331 "bitmap block (#%lu) reading failed",
1332 SB_AP_BITMAP(s)[i].bh->b_blocknr);
1333 for (i = 0; i < SB_BMAP_NR(s); i++)
1334 brelse(SB_AP_BITMAP(s)[i].bh);
1335 vfree(SB_AP_BITMAP(s));
1336 SB_AP_BITMAP(s) = NULL;
1337 return 1;
1338 }
1339 load_bitmap_info_data(s, SB_AP_BITMAP(s) + i);
1340 }
1341 return 0;
1342 }
1343
1344 static int read_old_bitmaps(struct super_block *s)
1345 {
1346 int i;
1347 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(s);
1348 int bmp1 = (REISERFS_OLD_DISK_OFFSET_IN_BYTES / s->s_blocksize) + 1; /* first of bitmap blocks */
1349
1350 /* read true bitmap */
1351 SB_AP_BITMAP(s) =
1352 vmalloc(sizeof(struct reiserfs_buffer_info *) * sb_bmap_nr(rs));
1353 if (SB_AP_BITMAP(s) == 0)
1354 return 1;
1355
1356 memset(SB_AP_BITMAP(s), 0,
1357 sizeof(struct reiserfs_buffer_info *) * sb_bmap_nr(rs));
1358
1359 for (i = 0; i < sb_bmap_nr(rs); i++) {
1360 SB_AP_BITMAP(s)[i].bh = sb_bread(s, bmp1 + i);
1361 if (!SB_AP_BITMAP(s)[i].bh)
1362 return 1;
1363 load_bitmap_info_data(s, SB_AP_BITMAP(s) + i);
1364 }
1365
1366 return 0;
1367 }
1368
1369 static int read_super_block(struct super_block *s, int offset)
1370 {
1371 struct buffer_head *bh;
1372 struct reiserfs_super_block *rs;
1373 int fs_blocksize;
1374
1375 bh = sb_bread(s, offset / s->s_blocksize);
1376 if (!bh) {
1377 reiserfs_warning(s, "sh-2006: read_super_block: "
1378 "bread failed (dev %s, block %lu, size %lu)",
1379 reiserfs_bdevname(s), offset / s->s_blocksize,
1380 s->s_blocksize);
1381 return 1;
1382 }
1383
1384 rs = (struct reiserfs_super_block *)bh->b_data;
1385 if (!is_any_reiserfs_magic_string(rs)) {
1386 brelse(bh);
1387 return 1;
1388 }
1389 //
1390 // ok, reiserfs signature (old or new) found in at the given offset
1391 //
1392 fs_blocksize = sb_blocksize(rs);
1393 brelse(bh);
1394 sb_set_blocksize(s, fs_blocksize);
1395
1396 bh = sb_bread(s, offset / s->s_blocksize);
1397 if (!bh) {
1398 reiserfs_warning(s, "sh-2007: read_super_block: "
1399 "bread failed (dev %s, block %lu, size %lu)\n",
1400 reiserfs_bdevname(s), offset / s->s_blocksize,
1401 s->s_blocksize);
1402 return 1;
1403 }
1404
1405 rs = (struct reiserfs_super_block *)bh->b_data;
1406 if (sb_blocksize(rs) != s->s_blocksize) {
1407 reiserfs_warning(s, "sh-2011: read_super_block: "
1408 "can't find a reiserfs filesystem on (dev %s, block %Lu, size %lu)\n",
1409 reiserfs_bdevname(s),
1410 (unsigned long long)bh->b_blocknr,
1411 s->s_blocksize);
1412 brelse(bh);
1413 return 1;
1414 }
1415
1416 if (rs->s_v1.s_root_block == cpu_to_le32(-1)) {
1417 brelse(bh);
1418 reiserfs_warning(s,
1419 "Unfinished reiserfsck --rebuild-tree run detected. Please run\n"
1420 "reiserfsck --rebuild-tree and wait for a completion. If that fails\n"
1421 "get newer reiserfsprogs package");
1422 return 1;
1423 }
1424
1425 SB_BUFFER_WITH_SB(s) = bh;
1426 SB_DISK_SUPER_BLOCK(s) = rs;
1427
1428 if (is_reiserfs_jr(rs)) {
1429 /* magic is of non-standard journal filesystem, look at s_version to
1430 find which format is in use */
1431 if (sb_version(rs) == REISERFS_VERSION_2)
1432 reiserfs_warning(s,
1433 "read_super_block: found reiserfs format \"3.6\""
1434 " with non-standard journal");
1435 else if (sb_version(rs) == REISERFS_VERSION_1)
1436 reiserfs_warning(s,
1437 "read_super_block: found reiserfs format \"3.5\""
1438 " with non-standard journal");
1439 else {
1440 reiserfs_warning(s,
1441 "sh-2012: read_super_block: found unknown "
1442 "format \"%u\" of reiserfs with non-standard magic",
1443 sb_version(rs));
1444 return 1;
1445 }
1446 } else
1447 /* s_version of standard format may contain incorrect information,
1448 so we just look at the magic string */
1449 reiserfs_info(s,
1450 "found reiserfs format \"%s\" with standard journal\n",
1451 is_reiserfs_3_5(rs) ? "3.5" : "3.6");
1452
1453 s->s_op = &reiserfs_sops;
1454 s->s_export_op = &reiserfs_export_ops;
1455 #ifdef CONFIG_QUOTA
1456 s->s_qcop = &reiserfs_qctl_operations;
1457 s->dq_op = &reiserfs_quota_operations;
1458 #endif
1459
1460 /* new format is limited by the 32 bit wide i_blocks field, want to
1461 ** be one full block below that.
1462 */
1463 s->s_maxbytes = (512LL << 32) - s->s_blocksize;
1464 return 0;
1465 }
1466
1467 /* after journal replay, reread all bitmap and super blocks */
1468 static int reread_meta_blocks(struct super_block *s)
1469 {
1470 int i;
1471 ll_rw_block(READ, 1, &(SB_BUFFER_WITH_SB(s)));
1472 wait_on_buffer(SB_BUFFER_WITH_SB(s));
1473 if (!buffer_uptodate(SB_BUFFER_WITH_SB(s))) {
1474 reiserfs_warning(s,
1475 "reread_meta_blocks, error reading the super");
1476 return 1;
1477 }
1478
1479 for (i = 0; i < SB_BMAP_NR(s); i++) {
1480 ll_rw_block(READ, 1, &(SB_AP_BITMAP(s)[i].bh));
1481 wait_on_buffer(SB_AP_BITMAP(s)[i].bh);
1482 if (!buffer_uptodate(SB_AP_BITMAP(s)[i].bh)) {
1483 reiserfs_warning(s,
1484 "reread_meta_blocks, error reading bitmap block number %d at %llu",
1485 i,
1486 (unsigned long long)SB_AP_BITMAP(s)[i].
1487 bh->b_blocknr);
1488 return 1;
1489 }
1490 }
1491 return 0;
1492
1493 }
1494
1495 /////////////////////////////////////////////////////
1496 // hash detection stuff
1497
1498 // if root directory is empty - we set default - Yura's - hash and
1499 // warn about it
1500 // FIXME: we look for only one name in a directory. If tea and yura
1501 // bith have the same value - we ask user to send report to the
1502 // mailing list
1503 static __u32 find_hash_out(struct super_block *s)
1504 {
1505 int retval;
1506 struct inode *inode;
1507 struct cpu_key key;
1508 INITIALIZE_PATH(path);
1509 struct reiserfs_dir_entry de;
1510 __u32 hash = DEFAULT_HASH;
1511
1512 inode = s->s_root->d_inode;
1513
1514 do { // Some serious "goto"-hater was there ;)
1515 u32 teahash, r5hash, yurahash;
1516
1517 make_cpu_key(&key, inode, ~0, TYPE_DIRENTRY, 3);
1518 retval = search_by_entry_key(s, &key, &path, &de);
1519 if (retval == IO_ERROR) {
1520 pathrelse(&path);
1521 return UNSET_HASH;
1522 }
1523 if (retval == NAME_NOT_FOUND)
1524 de.de_entry_num--;
1525 set_de_name_and_namelen(&de);
1526 if (deh_offset(&(de.de_deh[de.de_entry_num])) == DOT_DOT_OFFSET) {
1527 /* allow override in this case */
1528 if (reiserfs_rupasov_hash(s)) {
1529 hash = YURA_HASH;
1530 }
1531 reiserfs_warning(s, "FS seems to be empty, autodetect "
1532 "is using the default hash");
1533 break;
1534 }
1535 r5hash = GET_HASH_VALUE(r5_hash(de.de_name, de.de_namelen));
1536 teahash = GET_HASH_VALUE(keyed_hash(de.de_name, de.de_namelen));
1537 yurahash = GET_HASH_VALUE(yura_hash(de.de_name, de.de_namelen));
1538 if (((teahash == r5hash)
1539 &&
1540 (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num])))
1541 == r5hash)) || ((teahash == yurahash)
1542 && (yurahash ==
1543 GET_HASH_VALUE(deh_offset
1544 (&
1545 (de.
1546 de_deh[de.
1547 de_entry_num])))))
1548 || ((r5hash == yurahash)
1549 && (yurahash ==
1550 GET_HASH_VALUE(deh_offset
1551 (&(de.de_deh[de.de_entry_num])))))) {
1552 reiserfs_warning(s,
1553 "Unable to automatically detect hash function. "
1554 "Please mount with -o hash={tea,rupasov,r5}",
1555 reiserfs_bdevname(s));
1556 hash = UNSET_HASH;
1557 break;
1558 }
1559 if (GET_HASH_VALUE(deh_offset(&(de.de_deh[de.de_entry_num]))) ==
1560 yurahash)
1561 hash = YURA_HASH;
1562 else if (GET_HASH_VALUE
1563 (deh_offset(&(de.de_deh[de.de_entry_num]))) == teahash)
1564 hash = TEA_HASH;
1565 else if (GET_HASH_VALUE
1566 (deh_offset(&(de.de_deh[de.de_entry_num]))) == r5hash)
1567 hash = R5_HASH;
1568 else {
1569 reiserfs_warning(s, "Unrecognised hash function");
1570 hash = UNSET_HASH;
1571 }
1572 } while (0);
1573
1574 pathrelse(&path);
1575 return hash;
1576 }
1577
1578 // finds out which hash names are sorted with
1579 static int what_hash(struct super_block *s)
1580 {
1581 __u32 code;
1582
1583 code = sb_hash_function_code(SB_DISK_SUPER_BLOCK(s));
1584
1585 /* reiserfs_hash_detect() == true if any of the hash mount options
1586 ** were used. We must check them to make sure the user isn't
1587 ** using a bad hash value
1588 */
1589 if (code == UNSET_HASH || reiserfs_hash_detect(s))
1590 code = find_hash_out(s);
1591
1592 if (code != UNSET_HASH && reiserfs_hash_detect(s)) {
1593 /* detection has found the hash, and we must check against the
1594 ** mount options
1595 */
1596 if (reiserfs_rupasov_hash(s) && code != YURA_HASH) {
1597 reiserfs_warning(s, "Error, %s hash detected, "
1598 "unable to force rupasov hash",
1599 reiserfs_hashname(code));
1600 code = UNSET_HASH;
1601 } else if (reiserfs_tea_hash(s) && code != TEA_HASH) {
1602 reiserfs_warning(s, "Error, %s hash detected, "
1603 "unable to force tea hash",
1604 reiserfs_hashname(code));
1605 code = UNSET_HASH;
1606 } else if (reiserfs_r5_hash(s) && code != R5_HASH) {
1607 reiserfs_warning(s, "Error, %s hash detected, "
1608 "unable to force r5 hash",
1609 reiserfs_hashname(code));
1610 code = UNSET_HASH;
1611 }
1612 } else {
1613 /* find_hash_out was not called or could not determine the hash */
1614 if (reiserfs_rupasov_hash(s)) {
1615 code = YURA_HASH;
1616 } else if (reiserfs_tea_hash(s)) {
1617 code = TEA_HASH;
1618 } else if (reiserfs_r5_hash(s)) {
1619 code = R5_HASH;
1620 }
1621 }
1622
1623 /* if we are mounted RW, and we have a new valid hash code, update
1624 ** the super
1625 */
1626 if (code != UNSET_HASH &&
1627 !(s->s_flags & MS_RDONLY) &&
1628 code != sb_hash_function_code(SB_DISK_SUPER_BLOCK(s))) {
1629 set_sb_hash_function_code(SB_DISK_SUPER_BLOCK(s), code);
1630 }
1631 return code;
1632 }
1633
1634 // return pointer to appropriate function
1635 static hashf_t hash_function(struct super_block *s)
1636 {
1637 switch (what_hash(s)) {
1638 case TEA_HASH:
1639 reiserfs_info(s, "Using tea hash to sort names\n");
1640 return keyed_hash;
1641 case YURA_HASH:
1642 reiserfs_info(s, "Using rupasov hash to sort names\n");
1643 return yura_hash;
1644 case R5_HASH:
1645 reiserfs_info(s, "Using r5 hash to sort names\n");
1646 return r5_hash;
1647 }
1648 return NULL;
1649 }
1650
1651 // this is used to set up correct value for old partitions
1652 static int function2code(hashf_t func)
1653 {
1654 if (func == keyed_hash)
1655 return TEA_HASH;
1656 if (func == yura_hash)
1657 return YURA_HASH;
1658 if (func == r5_hash)
1659 return R5_HASH;
1660
1661 BUG(); // should never happen
1662
1663 return 0;
1664 }
1665
1666 #define SWARN(silent, s, ...) \
1667 if (!(silent)) \
1668 reiserfs_warning (s, __VA_ARGS__)
1669
1670 static int reiserfs_fill_super(struct super_block *s, void *data, int silent)
1671 {
1672 struct inode *root_inode;
1673 int j;
1674 struct reiserfs_transaction_handle th;
1675 int old_format = 0;
1676 unsigned long blocks;
1677 unsigned int commit_max_age = 0;
1678 int jinit_done = 0;
1679 struct reiserfs_iget_args args;
1680 struct reiserfs_super_block *rs;
1681 char *jdev_name;
1682 struct reiserfs_sb_info *sbi;
1683 int errval = -EINVAL;
1684
1685 sbi = kmalloc(sizeof(struct reiserfs_sb_info), GFP_KERNEL);
1686 if (!sbi) {
1687 errval = -ENOMEM;
1688 goto error;
1689 }
1690 s->s_fs_info = sbi;
1691 memset(sbi, 0, sizeof(struct reiserfs_sb_info));
1692 /* Set default values for options: non-aggressive tails, RO on errors */
1693 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_SMALLTAIL);
1694 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_ERROR_RO);
1695 /* no preallocation minimum, be smart in
1696 reiserfs_file_write instead */
1697 REISERFS_SB(s)->s_alloc_options.preallocmin = 0;
1698 /* Preallocate by 16 blocks (17-1) at once */
1699 REISERFS_SB(s)->s_alloc_options.preallocsize = 17;
1700 /* Initialize the rwsem for xattr dir */
1701 init_rwsem(&REISERFS_SB(s)->xattr_dir_sem);
1702
1703 /* setup default block allocator options */
1704 reiserfs_init_alloc_options(s);
1705
1706 jdev_name = NULL;
1707 if (reiserfs_parse_options
1708 (s, (char *)data, &(sbi->s_mount_opt), &blocks, &jdev_name,
1709 &commit_max_age) == 0) {
1710 goto error;
1711 }
1712
1713 if (blocks) {
1714 SWARN(silent, s, "jmacd-7: reiserfs_fill_super: resize option "
1715 "for remount only");
1716 goto error;
1717 }
1718
1719 /* try old format (undistributed bitmap, super block in 8-th 1k block of a device) */
1720 if (!read_super_block(s, REISERFS_OLD_DISK_OFFSET_IN_BYTES))
1721 old_format = 1;
1722 /* try new format (64-th 1k block), which can contain reiserfs super block */
1723 else if (read_super_block(s, REISERFS_DISK_OFFSET_IN_BYTES)) {
1724 SWARN(silent, s,
1725 "sh-2021: reiserfs_fill_super: can not find reiserfs on %s",
1726 reiserfs_bdevname(s));
1727 goto error;
1728 }
1729
1730 rs = SB_DISK_SUPER_BLOCK(s);
1731 /* Let's do basic sanity check to verify that underlying device is not
1732 smaller than the filesystem. If the check fails then abort and scream,
1733 because bad stuff will happen otherwise. */
1734 if (s->s_bdev && s->s_bdev->bd_inode
1735 && i_size_read(s->s_bdev->bd_inode) <
1736 sb_block_count(rs) * sb_blocksize(rs)) {
1737 SWARN(silent, s,
1738 "Filesystem on %s cannot be mounted because it is bigger than the device",
1739 reiserfs_bdevname(s));
1740 SWARN(silent, s,
1741 "You may need to run fsck or increase size of your LVM partition");
1742 SWARN(silent, s,
1743 "Or may be you forgot to reboot after fdisk when it told you to");
1744 goto error;
1745 }
1746
1747 sbi->s_mount_state = SB_REISERFS_STATE(s);
1748 sbi->s_mount_state = REISERFS_VALID_FS;
1749
1750 if (old_format ? read_old_bitmaps(s) : read_bitmaps(s)) {
1751 SWARN(silent, s,
1752 "jmacd-8: reiserfs_fill_super: unable to read bitmap");
1753 goto error;
1754 }
1755 #ifdef CONFIG_REISERFS_CHECK
1756 SWARN(silent, s, "CONFIG_REISERFS_CHECK is set ON");
1757 SWARN(silent, s, "- it is slow mode for debugging.");
1758 #endif
1759
1760 /* make data=ordered the default */
1761 if (!reiserfs_data_log(s) && !reiserfs_data_ordered(s) &&
1762 !reiserfs_data_writeback(s)) {
1763 REISERFS_SB(s)->s_mount_opt |= (1 << REISERFS_DATA_ORDERED);
1764 }
1765
1766 if (reiserfs_data_log(s)) {
1767 reiserfs_info(s, "using journaled data mode\n");
1768 } else if (reiserfs_data_ordered(s)) {
1769 reiserfs_info(s, "using ordered data mode\n");
1770 } else {
1771 reiserfs_info(s, "using writeback data mode\n");
1772 }
1773 if (reiserfs_barrier_flush(s)) {
1774 printk("reiserfs: using flush barriers\n");
1775 }
1776 // set_device_ro(s->s_dev, 1) ;
1777 if (journal_init(s, jdev_name, old_format, commit_max_age)) {
1778 SWARN(silent, s,
1779 "sh-2022: reiserfs_fill_super: unable to initialize journal space");
1780 goto error;
1781 } else {
1782 jinit_done = 1; /* once this is set, journal_release must be called
1783 ** if we error out of the mount
1784 */
1785 }
1786 if (reread_meta_blocks(s)) {
1787 SWARN(silent, s,
1788 "jmacd-9: reiserfs_fill_super: unable to reread meta blocks after journal init");
1789 goto error;
1790 }
1791
1792 if (replay_only(s))
1793 goto error;
1794
1795 if (bdev_read_only(s->s_bdev) && !(s->s_flags & MS_RDONLY)) {
1796 SWARN(silent, s,
1797 "clm-7000: Detected readonly device, marking FS readonly");
1798 s->s_flags |= MS_RDONLY;
1799 }
1800 args.objectid = REISERFS_ROOT_OBJECTID;
1801 args.dirid = REISERFS_ROOT_PARENT_OBJECTID;
1802 root_inode =
1803 iget5_locked(s, REISERFS_ROOT_OBJECTID, reiserfs_find_actor,
1804 reiserfs_init_locked_inode, (void *)(&args));
1805 if (!root_inode) {
1806 SWARN(silent, s,
1807 "jmacd-10: reiserfs_fill_super: get root inode failed");
1808 goto error;
1809 }
1810
1811 if (root_inode->i_state & I_NEW) {
1812 reiserfs_read_locked_inode(root_inode, &args);
1813 unlock_new_inode(root_inode);
1814 }
1815
1816 s->s_root = d_alloc_root(root_inode);
1817 if (!s->s_root) {
1818 iput(root_inode);
1819 goto error;
1820 }
1821 // define and initialize hash function
1822 sbi->s_hash_function = hash_function(s);
1823 if (sbi->s_hash_function == NULL) {
1824 dput(s->s_root);
1825 s->s_root = NULL;
1826 goto error;
1827 }
1828
1829 if (is_reiserfs_3_5(rs)
1830 || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1))
1831 set_bit(REISERFS_3_5, &(sbi->s_properties));
1832 else
1833 set_bit(REISERFS_3_6, &(sbi->s_properties));
1834
1835 if (!(s->s_flags & MS_RDONLY)) {
1836
1837 errval = journal_begin(&th, s, 1);
1838 if (errval) {
1839 dput(s->s_root);
1840 s->s_root = NULL;
1841 goto error;
1842 }
1843 reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
1844
1845 set_sb_umount_state(rs, REISERFS_ERROR_FS);
1846 set_sb_fs_state(rs, 0);
1847
1848 if (old_format_only(s)) {
1849 /* filesystem of format 3.5 either with standard or non-standard
1850 journal */
1851 if (convert_reiserfs(s)) {
1852 /* and -o conv is given */
1853 if (!silent)
1854 reiserfs_info(s,
1855 "converting 3.5 filesystem to the 3.6 format");
1856
1857 if (is_reiserfs_3_5(rs))
1858 /* put magic string of 3.6 format. 2.2 will not be able to
1859 mount this filesystem anymore */
1860 memcpy(rs->s_v1.s_magic,
1861 reiserfs_3_6_magic_string,
1862 sizeof
1863 (reiserfs_3_6_magic_string));
1864
1865 set_sb_version(rs, REISERFS_VERSION_2);
1866 reiserfs_convert_objectid_map_v1(s);
1867 set_bit(REISERFS_3_6, &(sbi->s_properties));
1868 clear_bit(REISERFS_3_5, &(sbi->s_properties));
1869 } else if (!silent) {
1870 reiserfs_info(s, "using 3.5.x disk format\n");
1871 }
1872 }
1873
1874 journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB(s));
1875 errval = journal_end(&th, s, 1);
1876 if (errval) {
1877 dput(s->s_root);
1878 s->s_root = NULL;
1879 goto error;
1880 }
1881
1882 if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
1883 dput(s->s_root);
1884 s->s_root = NULL;
1885 goto error;
1886 }
1887
1888 /* look for files which were to be removed in previous session */
1889 finish_unfinished(s);
1890 } else {
1891 if (old_format_only(s) && !silent) {
1892 reiserfs_info(s, "using 3.5.x disk format\n");
1893 }
1894
1895 if ((errval = reiserfs_xattr_init(s, s->s_flags))) {
1896 dput(s->s_root);
1897 s->s_root = NULL;
1898 goto error;
1899 }
1900 }
1901 // mark hash in super block: it could be unset. overwrite should be ok
1902 set_sb_hash_function_code(rs, function2code(sbi->s_hash_function));
1903
1904 handle_attrs(s);
1905
1906 reiserfs_proc_info_init(s);
1907
1908 init_waitqueue_head(&(sbi->s_wait));
1909 spin_lock_init(&sbi->bitmap_lock);
1910
1911 return (0);
1912
1913 error:
1914 if (jinit_done) { /* kill the commit thread, free journal ram */
1915 journal_release_error(NULL, s);
1916 }
1917 if (SB_DISK_SUPER_BLOCK(s)) {
1918 for (j = 0; j < SB_BMAP_NR(s); j++) {
1919 if (SB_AP_BITMAP(s))
1920 brelse(SB_AP_BITMAP(s)[j].bh);
1921 }
1922 vfree(SB_AP_BITMAP(s));
1923 }
1924 if (SB_BUFFER_WITH_SB(s))
1925 brelse(SB_BUFFER_WITH_SB(s));
1926 #ifdef CONFIG_QUOTA
1927 for (j = 0; j < MAXQUOTAS; j++) {
1928 kfree(sbi->s_qf_names[j]);
1929 sbi->s_qf_names[j] = NULL;
1930 }
1931 #endif
1932 kfree(sbi);
1933
1934 s->s_fs_info = NULL;
1935 return errval;
1936 }
1937
1938 static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf)
1939 {
1940 struct reiserfs_super_block *rs = SB_DISK_SUPER_BLOCK(dentry->d_sb);
1941
1942 buf->f_namelen = (REISERFS_MAX_NAME(s->s_blocksize));
1943 buf->f_bfree = sb_free_blocks(rs);
1944 buf->f_bavail = buf->f_bfree;
1945 buf->f_blocks = sb_block_count(rs) - sb_bmap_nr(rs) - 1;
1946 buf->f_bsize = dentry->d_sb->s_blocksize;
1947 /* changed to accommodate gcc folks. */
1948 buf->f_type = REISERFS_SUPER_MAGIC;
1949 return 0;
1950 }
1951
1952 #ifdef CONFIG_QUOTA
1953 static int reiserfs_dquot_initialize(struct inode *inode, int type)
1954 {
1955 struct reiserfs_transaction_handle th;
1956 int ret, err;
1957
1958 /* We may create quota structure so we need to reserve enough blocks */
1959 reiserfs_write_lock(inode->i_sb);
1960 ret =
1961 journal_begin(&th, inode->i_sb,
1962 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1963 if (ret)
1964 goto out;
1965 ret = dquot_initialize(inode, type);
1966 err =
1967 journal_end(&th, inode->i_sb,
1968 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb));
1969 if (!ret && err)
1970 ret = err;
1971 out:
1972 reiserfs_write_unlock(inode->i_sb);
1973 return ret;
1974 }
1975
1976 static int reiserfs_dquot_drop(struct inode *inode)
1977 {
1978 struct reiserfs_transaction_handle th;
1979 int ret, err;
1980
1981 /* We may delete quota structure so we need to reserve enough blocks */
1982 reiserfs_write_lock(inode->i_sb);
1983 ret =
1984 journal_begin(&th, inode->i_sb,
1985 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1986 if (ret)
1987 goto out;
1988 ret = dquot_drop(inode);
1989 err =
1990 journal_end(&th, inode->i_sb,
1991 2 * REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb));
1992 if (!ret && err)
1993 ret = err;
1994 out:
1995 reiserfs_write_unlock(inode->i_sb);
1996 return ret;
1997 }
1998
1999 static int reiserfs_write_dquot(struct dquot *dquot)
2000 {
2001 struct reiserfs_transaction_handle th;
2002 int ret, err;
2003
2004 reiserfs_write_lock(dquot->dq_sb);
2005 ret =
2006 journal_begin(&th, dquot->dq_sb,
2007 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2008 if (ret)
2009 goto out;
2010 ret = dquot_commit(dquot);
2011 err =
2012 journal_end(&th, dquot->dq_sb,
2013 REISERFS_QUOTA_TRANS_BLOCKS(dquot->dq_sb));
2014 if (!ret && err)
2015 ret = err;
2016 out:
2017 reiserfs_write_unlock(dquot->dq_sb);
2018 return ret;
2019 }
2020
2021 static int reiserfs_acquire_dquot(struct dquot *dquot)
2022 {
2023 struct reiserfs_transaction_handle th;
2024 int ret, err;
2025
2026 reiserfs_write_lock(dquot->dq_sb);
2027 ret =
2028 journal_begin(&th, dquot->dq_sb,
2029 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2030 if (ret)
2031 goto out;
2032 ret = dquot_acquire(dquot);
2033 err =
2034 journal_end(&th, dquot->dq_sb,
2035 REISERFS_QUOTA_INIT_BLOCKS(dquot->dq_sb));
2036 if (!ret && err)
2037 ret = err;
2038 out:
2039 reiserfs_write_unlock(dquot->dq_sb);
2040 return ret;
2041 }
2042
2043 static int reiserfs_release_dquot(struct dquot *dquot)
2044 {
2045 struct reiserfs_transaction_handle th;
2046 int ret, err;
2047
2048 reiserfs_write_lock(dquot->dq_sb);
2049 ret =
2050 journal_begin(&th, dquot->dq_sb,
2051 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2052 if (ret)
2053 goto out;
2054 ret = dquot_release(dquot);
2055 err =
2056 journal_end(&th, dquot->dq_sb,
2057 REISERFS_QUOTA_DEL_BLOCKS(dquot->dq_sb));
2058 if (!ret && err)
2059 ret = err;
2060 out:
2061 reiserfs_write_unlock(dquot->dq_sb);
2062 return ret;
2063 }
2064
2065 static int reiserfs_mark_dquot_dirty(struct dquot *dquot)
2066 {
2067 /* Are we journalling quotas? */
2068 if (REISERFS_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2069 REISERFS_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2070 dquot_mark_dquot_dirty(dquot);
2071 return reiserfs_write_dquot(dquot);
2072 } else
2073 return dquot_mark_dquot_dirty(dquot);
2074 }
2075
2076 static int reiserfs_write_info(struct super_block *sb, int type)
2077 {
2078 struct reiserfs_transaction_handle th;
2079 int ret, err;
2080
2081 /* Data block + inode block */
2082 reiserfs_write_lock(sb);
2083 ret = journal_begin(&th, sb, 2);
2084 if (ret)
2085 goto out;
2086 ret = dquot_commit_info(sb, type);
2087 err = journal_end(&th, sb, 2);
2088 if (!ret && err)
2089 ret = err;
2090 out:
2091 reiserfs_write_unlock(sb);
2092 return ret;
2093 }
2094
2095 /*
2096 * Turn on quotas during mount time - we need to find the quota file and such...
2097 */
2098 static int reiserfs_quota_on_mount(struct super_block *sb, int type)
2099 {
2100 return vfs_quota_on_mount(sb, REISERFS_SB(sb)->s_qf_names[type],
2101 REISERFS_SB(sb)->s_jquota_fmt, type);
2102 }
2103
2104 /*
2105 * Standard function to be called on quota_on
2106 */
2107 static int reiserfs_quota_on(struct super_block *sb, int type, int format_id,
2108 char *path)
2109 {
2110 int err;
2111 struct nameidata nd;
2112
2113 if (!(REISERFS_SB(sb)->s_mount_opt & (1 << REISERFS_QUOTA)))
2114 return -EINVAL;
2115 err = path_lookup(path, LOOKUP_FOLLOW, &nd);
2116 if (err)
2117 return err;
2118 /* Quotafile not on the same filesystem? */
2119 if (nd.mnt->mnt_sb != sb) {
2120 path_release(&nd);
2121 return -EXDEV;
2122 }
2123 /* We must not pack tails for quota files on reiserfs for quota IO to work */
2124 if (!REISERFS_I(nd.dentry->d_inode)->i_flags & i_nopack_mask) {
2125 reiserfs_warning(sb,
2126 "reiserfs: Quota file must have tail packing disabled.");
2127 path_release(&nd);
2128 return -EINVAL;
2129 }
2130 /* Not journalling quota? No more tests needed... */
2131 if (!REISERFS_SB(sb)->s_qf_names[USRQUOTA] &&
2132 !REISERFS_SB(sb)->s_qf_names[GRPQUOTA]) {
2133 path_release(&nd);
2134 return vfs_quota_on(sb, type, format_id, path);
2135 }
2136 /* Quotafile not of fs root? */
2137 if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode)
2138 reiserfs_warning(sb,
2139 "reiserfs: Quota file not on filesystem root. "
2140 "Journalled quota will not work.");
2141 path_release(&nd);
2142 return vfs_quota_on(sb, type, format_id, path);
2143 }
2144
2145 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2146 * acquiring the locks... As quota files are never truncated and quota code
2147 * itself serializes the operations (and noone else should touch the files)
2148 * we don't have to be afraid of races */
2149 static ssize_t reiserfs_quota_read(struct super_block *sb, int type, char *data,
2150 size_t len, loff_t off)
2151 {
2152 struct inode *inode = sb_dqopt(sb)->files[type];
2153 unsigned long blk = off >> sb->s_blocksize_bits;
2154 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2155 size_t toread;
2156 struct buffer_head tmp_bh, *bh;
2157 loff_t i_size = i_size_read(inode);
2158
2159 if (off > i_size)
2160 return 0;
2161 if (off + len > i_size)
2162 len = i_size - off;
2163 toread = len;
2164 while (toread > 0) {
2165 tocopy =
2166 sb->s_blocksize - offset <
2167 toread ? sb->s_blocksize - offset : toread;
2168 tmp_bh.b_state = 0;
2169 /* Quota files are without tails so we can safely use this function */
2170 reiserfs_write_lock(sb);
2171 err = reiserfs_get_block(inode, blk, &tmp_bh, 0);
2172 reiserfs_write_unlock(sb);
2173 if (err)
2174 return err;
2175 if (!buffer_mapped(&tmp_bh)) /* A hole? */
2176 memset(data, 0, tocopy);
2177 else {
2178 bh = sb_bread(sb, tmp_bh.b_blocknr);
2179 if (!bh)
2180 return -EIO;
2181 memcpy(data, bh->b_data + offset, tocopy);
2182 brelse(bh);
2183 }
2184 offset = 0;
2185 toread -= tocopy;
2186 data += tocopy;
2187 blk++;
2188 }
2189 return len;
2190 }
2191
2192 /* Write to quotafile (we know the transaction is already started and has
2193 * enough credits) */
2194 static ssize_t reiserfs_quota_write(struct super_block *sb, int type,
2195 const char *data, size_t len, loff_t off)
2196 {
2197 struct inode *inode = sb_dqopt(sb)->files[type];
2198 unsigned long blk = off >> sb->s_blocksize_bits;
2199 int err = 0, offset = off & (sb->s_blocksize - 1), tocopy;
2200 int journal_quota = REISERFS_SB(sb)->s_qf_names[type] != NULL;
2201 size_t towrite = len;
2202 struct buffer_head tmp_bh, *bh;
2203
2204 mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
2205 while (towrite > 0) {
2206 tocopy = sb->s_blocksize - offset < towrite ?
2207 sb->s_blocksize - offset : towrite;
2208 tmp_bh.b_state = 0;
2209 err = reiserfs_get_block(inode, blk, &tmp_bh, GET_BLOCK_CREATE);
2210 if (err)
2211 goto out;
2212 if (offset || tocopy != sb->s_blocksize)
2213 bh = sb_bread(sb, tmp_bh.b_blocknr);
2214 else
2215 bh = sb_getblk(sb, tmp_bh.b_blocknr);
2216 if (!bh) {
2217 err = -EIO;
2218 goto out;
2219 }
2220 lock_buffer(bh);
2221 memcpy(bh->b_data + offset, data, tocopy);
2222 flush_dcache_page(bh->b_page);
2223 set_buffer_uptodate(bh);
2224 unlock_buffer(bh);
2225 reiserfs_prepare_for_journal(sb, bh, 1);
2226 journal_mark_dirty(current->journal_info, sb, bh);
2227 if (!journal_quota)
2228 reiserfs_add_ordered_list(inode, bh);
2229 brelse(bh);
2230 offset = 0;
2231 towrite -= tocopy;
2232 data += tocopy;
2233 blk++;
2234 }
2235 out:
2236 if (len == towrite)
2237 return err;
2238 if (inode->i_size < off + len - towrite)
2239 i_size_write(inode, off + len - towrite);
2240 inode->i_version++;
2241 inode->i_mtime = inode->i_ctime = CURRENT_TIME;
2242 mark_inode_dirty(inode);
2243 mutex_unlock(&inode->i_mutex);
2244 return len - towrite;
2245 }
2246
2247 #endif
2248
2249 static int get_super_block(struct file_system_type *fs_type,
2250 int flags, const char *dev_name,
2251 void *data, struct vfsmount *mnt)
2252 {
2253 return get_sb_bdev(fs_type, flags, dev_name, data, reiserfs_fill_super,
2254 mnt);
2255 }
2256
2257 static int __init init_reiserfs_fs(void)
2258 {
2259 int ret;
2260
2261 if ((ret = init_inodecache())) {
2262 return ret;
2263 }
2264
2265 if ((ret = reiserfs_xattr_register_handlers()))
2266 goto failed_reiserfs_xattr_register_handlers;
2267
2268 reiserfs_proc_info_global_init();
2269 reiserfs_proc_register_global("version",
2270 reiserfs_global_version_in_proc);
2271
2272 ret = register_filesystem(&reiserfs_fs_type);
2273
2274 if (ret == 0) {
2275 return 0;
2276 }
2277
2278 reiserfs_xattr_unregister_handlers();
2279
2280 failed_reiserfs_xattr_register_handlers:
2281 reiserfs_proc_unregister_global("version");
2282 reiserfs_proc_info_global_done();
2283 destroy_inodecache();
2284
2285 return ret;
2286 }
2287
2288 static void __exit exit_reiserfs_fs(void)
2289 {
2290 reiserfs_xattr_unregister_handlers();
2291 reiserfs_proc_unregister_global("version");
2292 reiserfs_proc_info_global_done();
2293 unregister_filesystem(&reiserfs_fs_type);
2294 destroy_inodecache();
2295 }
2296
2297 struct file_system_type reiserfs_fs_type = {
2298 .owner = THIS_MODULE,
2299 .name = "reiserfs",
2300 .get_sb = get_super_block,
2301 .kill_sb = kill_block_super,
2302 .fs_flags = FS_REQUIRES_DEV,
2303 };
2304
2305 MODULE_DESCRIPTION("ReiserFS journaled filesystem");
2306 MODULE_AUTHOR("Hans Reiser <reiser@namesys.com>");
2307 MODULE_LICENSE("GPL");
2308
2309 module_init(init_reiserfs_fs);
2310 module_exit(exit_reiserfs_fs);
Log-structured file system for Linux